“A very strong case with enough metal to accept a variety of fasteners, I've half a dozen in use around the house.
It runs a bit hot while streaming U/HD to TV so I bodged a 20mm length of 60mm dia. cardboard tube (as a stand-off) topped with a thin 60mm 5v fan* the Pi now maintains 30 degrees C. with the airflow exiting along the ribs.
*powered by the 3v pins it's almost silent.”